Cox Regression Plots

Plots can help you to evaluate your estimated model and interpret the results. You can plot the survival, hazard, log-minus-log, and one-minus-survival functions.

Plot Type

Survival

Displays the cumulative survival function on a linear scale.

Hazard

Displays the cumulative hazard function on a linear scale.

Log minus log

The cumulative survival estimate after the ln(-ln) transformation is applied to the estimate.

One minus survival

Plots one-minus the survival function on a linear scale.

Covariate Values Plotted at

You can plot a separate line for each value of a categorical covariate by moving that covariate into the Separate Lines for text box. This option is available only for categorical covariates, which are denoted by (Cat) after their names in the Covariate Values Plotted at list.

Change Value

Because these functions depend on values of the covariates, you must use constant values for the covariates to plot the functions versus time. The default is to use the mean of each covariate as a constant value, but you can enter your own values for the plot using the Change Value control group.

Obtaining a Cox Regression Plot

This feature requires Custom Tables and Advanced Statistics.

1. From the menus choose:

   Analyze > Survival > Cox Regression

   or

   Analyze > Survival > Cox w/ Time-Dep Cov

2. In the Cox Regression dialog, click Plots.